Helianthus tuberosus

Basic information
Scientific name	Helianthus tuberosus	Click to magnify
Common names	Jerusalem artichoke
Higher taxon	Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range	North America.
Habitat	Farm area, fruit garden, roadside, vacancy, grassland, etc.

Invasion information
Range in Japan	Almost entire Japan
Origin	Unknown.
Date	Introduced since 1895
Route	Deliberate: As ingredient of alcohol and inulin, for cattle food, as ornamental plant, etc.
Impact	Actually: Competition with native grasses and crops. Potentially: Parasite (insects, fungi) Native organism(s) affected: Native plants (especially riverside species), crops.
Regulation in Japan	No action for prevention, mitigation, control, or eradication.
Introduced range in other countries	South America, Europe, Asia, Oceania

Reference	Notes
Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Osaka (in Jpn) Shimizu (ed) (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn) etc.